OFFSET
0,3
COMMENTS
a(n) equals the permanent of the n X n matrix with 1's along the central thirteen diagonals, and 0's everywhere else. - John M. Campbell, Jul 10 2011
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..1000 (terms n=1..400 from R. H. Hardin)
Torleiv Kløve, Spheres of Permutations under the Infinity Norm - Permutations with limited displacement, Reports in Informatics, Department of Informatics, University of Bergen, Norway, no. 376, November 2008.
FORMULA
G.f. is a rational function f(x)/g(x) where f has degree 482 and g has degree 494.
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Torleiv Kløve, Jan 13 2009
EXTENSIONS
a(0)=1 prepended by Alois P. Heinz, Jan 28 2019
STATUS
approved